A shift photon emitter can be made as an IC chip with 64 light emitting diodes built on it. Take the electromagnetic frequency range from 400 to 800THz. Divide this range of frequencies into 64 peices. The 64-LED chip has to be able to emit all 64 frequencies.
Next, you are going to tile an emission surface with these 64-LED chips. Each of these chips has to be driven by an electronics circuit. The circuit has to step through each of the frequencies, in order of increasing frequency. The circuit will step through the 64 frequency spectrum. This is how you generate shift photons. The shift photons will in turn generate an acceleration field.
Let me tell you about the hardware of shift photon emission sources. What do you get when you cross a light emitting diode with a BGA (ball grid array) IC chip? Replace the black packaging of an IC chip with a transparent material. Next, replace the transistors with Gallium Aluminum Arsenide light emitting materials. You could very easily come up with a BGA LED chip with 8, 16, 32 or 64 distinct frequencies in the 400 to 800 THz range.
Next, you take your spaceship, or acceleration field generator surface, and you tessellate it with thousands of 64-LED chips. A clock in the megahertz range would cause the 64-LED chips to emit shift photons with 64 frequency steps, from 400 to 800THz.
The powerful acceleration fields of a black hole will cause light to frequency shift when it travels along the black hole's radius. The question is: will shift photon generators induce a gravity field? Do the laws of physics observe a symmetry between gravitational potential energy and photon frequency shift?